ib PROCEEDINGS OF THE CHICAGO MEETING 



small blocks. Of these blocks the northernmost has dropped six feet ; the next 

 one, without dropping, has tipped to the nortli and rests against the first block, 

 leaving a space two to six feet wide between the blocks. This is the cave. 

 On the south side of this last block a corresponding crevice gapes with an 

 opening some ten feet wide at the top and narrowing toward the rubbish-filled 



bottom far below. Tlie tops of these blocks are glaciated, the walls are fresh 

 and unweathered, and, though small, the fault is very young. On the north- 

 west corner of the mountain, near the so-called "Bears Den," is another set of 

 joints, the largest of which gapes and is filled with debris, a tiny brook origi- 

 nating in it. This trends northeasterly and is crossed by a north-trending 



